Talk:Opera Soft

Source

 * https://web.archive.org/web/20190706122542/http://publicaciones.retromuseo.com:8123/Revistasv1/Retro%20Gamer/retro%20gamer%20007.pdf
 * https://web.archive.org/web/20010124061900/http://www.codexmx.com/macedonia/opera.htm